<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
		.a{width: 300px;
		height: 150px;
		border:1px solid red;
		border-radius:0px 0px 300px 300px ;}
		</style>
	</head>
	<body>
		<div class="a"></div>
	</body>
</html>
